Two dimensional NMR and NMR relaxation studies of coal structure
This report coves the progress made on the title project and summarizes the accomplishments for the project period. Four major areas of inquiry have been pursued. Advanced solid state NMR methods are being developed to assay the distribution of the various important functional groups in coals that determine the reactivity of coals. Other methods are being developed which will also determine how these functional groups are linked together. A third area of investigation concerns how molecular mobility in coals impacts NMR relaxation times, which is important for interpretation of such data in terms of the mobile phase in coals model. Along the same lines we are also using these studies to establish protocols for obtaining the best quantitative response from coals in solid state C-13 NMR spectra. The effects of very high MAS rates (>10 kHz) on cross polarization dynamics are also being investigated for similar reasons. 5 figs.
- Research Organization:
- Yale Univ., New Haven, CT (USA). Dept. of Chemistry
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- FG22-87PC79910
- OSTI ID:
- 5567954
- Report Number(s):
- DOE/PC/79910-5; ON: DE91013914
- Country of Publication:
- United States
- Language:
- English
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Two dimensional NMR and NMR relaxation studies of coal structure
Two dimensional NMR and NMR relaxation studies of coal structure
Related Subjects
010600* -- Coal
Lignite
& Peat-- Properties & Composition
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARBONACEOUS MATERIALS
COAL
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
MAGNETIC RESONANCE
MAGNETISM
MATERIALS
MOLECULAR STRUCTURE
NUCLEAR MAGNETIC RESONANCE
PARAMAGNETISM
PROGRESS REPORT
RELAXATION
RESONANCE
SPECTRA
SPIN-LATTICE RELAXATION